Communications Engineering Exam 6: ECE Pre-Board - Answers

Below are the answers key for the 100 items set of Practice Examination 6 in Communications Engineering composed of previous Board Exams Questions and cautiously selected questions from various topics in Communications Engineering (Electronics Systems and Technology) that could possibly be given in the board.

1. 150 watts

2. During experimental period

3. High VHF band

4. DC and RF heating of resistors, causing then to change values.

5. E

6. Mobile radio

7. Carrier

8. 100 times bigger

9. Helical

10. Pulse generator laser

11. com

12. An equivalent resistance that would dissipate the same amount of power as that radiated from an antenna

13. Back wave

14. Immunity to noise

15. Photovoltaic effect

16. Telstar I

17. 30 to 300 GHz

18. Suppressed white noise

19. Secondary

20. F

21. Computer data

22. 401.00625 MHz

23. 80,000 watts

24. Clear to send

25. 0% modulation

26. Radio operator telegraphy onboard

27. Binary form

28. Necessary bandwidth

29. Local oscillator

30. One at a time

31. Loose connections in the oscillator, amplifier, or antenna circuits.

32. Antenna

33. Mean power

34. 235.50 MHz

35. 8

36. video stage gain

37. 6 dB

38. gov

39. Dept. order 88

40. UHF band

41. Four

42. Electromagnetic

43. 1.0025 MHz

44. Dynamic instability

45. Transmitter, channel and receiver

46. CCIR

47. Call waiting tone

48. Bandwidth

49. 401.0125 MHz

50. Closer coupling between the oscillator and the antenna.

51. Double sideband full carrier

52. 405.050 MHz

53. Value-added service provided

54. Two way simultaneous transmission

55. A

56. Balun

57. Contrast

58. Mu-law

59. Type of modulation of the main carrier

60. NTC

61. Antenna efficiency

62. MF band

63. Dielectrics in the line

64. Uniform resource locator

65. Spark emission

66. Geosynchronous satellite

67. Hertzian waves

68. 20

69. The transmitter and receiver

70. The ratio of the maximum carrier frequency deviation to the highest audio modulation frequency

71. Retarder

72. R.A. No. 3396

73. Time division

74. Technical, legal and financial

75. MOPA

76. The velocity of the wave on the transmission line divided by the velocity of light in a vacuum